Nucleic Acids Research, 1984, Vol. 12, No. 2 1117-1135
© 1984
MOLECULAR BIOLOGY |
Identification and sequence analysis of the 5' end of the major chicken vitellogenin gene
Department of Genetics, Fred Hutchinson Cancer Research Center 1124 Columbia Street, Seattle, WA 98104, USA
Received September 27, 1983. Revised December 6, 1983. Accepted December 6, 1983.
We have precisely determined the positions of the first three exons for the major chicken vitellogenin gene (VTG II) by a combination of S1 nuclease protection, primer extension and DNA sequencing experiments. In addition, we have determined the nucleotide sequences of the 5' flanking nuclease hypersensitive sites that we have previously shown are induced during the estrogen mediated activation of the VTG II gene in liver (1). One of these Sites 15 found to be nearly identical to the enhancer core sequence of SV4O. A computer assisted analysis of the DNA sequences upstream from the VTG II gene has revealed four short (7 to 9 base pair) sequence elements that are present in similar positions flanking the other major estrogen inducible gene for liver, very low density apolipoprotein II (apoVLDL II). For VTG II, these sequences are located between two of the induced nuclease hypersensitive sites that are liver specific. Sequences homologous to one element, located approximately 100 base pairs upstream from the mRNA cap sites of the VTG II and apoVLDL II genes, are also observed for three estrogen inducible genes that are expressed in the oviduct, although for each of these genes the sequence falls further upstream, between 220 and 200. We suggest that these conserved sequences may be important in mediating the tissue specific responses of these genes to estrogen.
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